Gun sight



tatlmt My ll ll Mimi l l Patented Apr. 9, 1946 UNITED STATES PATENTOFFICE GUN SIGHT John D. Howell, Ilion, N. Y., assignor to RemingtonArms Company, Inc., Bridgeport, Conn., a corporation of DelawareApplication February 29, 1944, Serial No. 524,355

9 Claims.

tion, the adjustable step member being shown in its zero or shortestrange position.

Fig. 2 is a plan view thereof.

Fig. 3 is a fragmentary longitudinal sectional member engaged as asupport beneath the end of view, on an enlarged scale, showing the Stepthe leaf spring arm upon which the rear sight her in an intermediateposition of range adjustis carried. Because of slight variations betweenment, the rear sight being elevated with respect individual guns and thefact that a correct sight to the zero position shown in Figs. 1 and 2.for one man may be incorrect for another, due Fig. 4 is a verticaltransverse sectional view to individual differences in shootingtechnique taken along the line 4-4 of Fig. 3. and in eye correlation insighting the target along Fig. 5 is a vertical transverse sectional viewthe sights, it is desirable that a simple and efiitaken along the line55 of Fig. 3. cient means be provided for zeroing the sight Fig. 6 is aside elevation of the step member at the correct height for theindividual gun and and its supporting cradle, according to a modifiedits user, and it is an object of the present invenform of the invention.tion to provide an adjustment means of this Fig. 7 is a front end viewof the cradle shown in character, A further object is to provide suchFig. 6. zeroing adjustment means through which the Similar referencecharacters indicate correstep member may be raised or lowered throughsponding parts throughout the several figures of slight increments ofmovement without changing the drawing. the normal angle of the rangesteps of the step Referring to the drawin the gun barrel I0 is member,to the end that the height adjustment provided at its upper side with adovetail mortise in the zero or shortest range position of the sight IIin which the dovetail tenon I! of the leaf will not change the relativeelevation of the sucspring arm [3 of the rear sight is engaged andsecessive range steps with respect to each other, cured, the rear sightbeing integrally formed upon and consequently will not destroy thecalculated the rear end of the arm l3, and consisting of an correlationbetween the individual steps and preupwardly projecting rearwardlyinclined flange designated ranges. l4 having its rearwardly facingobservable surface It is proposed, according to the illustrated exl5ground to a flat plane and provided centrally emplary embodiment of theinvention, to provide of its upper edge with an open sight notch IS. alongitudinally adjustable supporting cradle for The leaf spring arm I3is provided with a longithe step member, adapted through relative longitudinally extending slot l1 extending forwardly tudinal movement tolower or elevate the step from the flange l4, and within which theadjustmember while maintaining it in exact parallel reable step memberis adapted to be slidably enlation,- and whereby the individual steps ofthe gaged, as will presently more fully appear, the step member remainin the same angular relation lower edge of the flange l4 within therearward to the axis of the gun, and represent the same inend of theslot being ground at a rearwardly and crements of elevation, in anyposition of zeroing downwardly inclined angle to provide a stepenadjustment. gaging tooth edge [8. The upper side of the gun Anotherobject is to provide a zeroing adjustbarrel I0 is provided withalongitudinally extendment means which will effectually maintain its ingslot I9 centrally aligned with the slot l1, and adjusted relation, whilepermitting convenient in which the adjustable cradle and step membersre-adjustment when desired and easy operation are slidably engaged andretained as a sub-asof the step member for normal range adjustmentsembly through the tension of the leaf spring of the rear sight. arm l3,as will presently more fully appear.

With the above and other objects in view, em- The step adjustment meansfor the rear sight bodiments of the invention are shown in the acis inthe form of a two-piece sub-assembly, comcompanying drawing, and theseembodiments prising the step member engaged with the rear will behereinafter more fully described with refsight and a cradle membercarrying the step erence thereto, and the invention will be finallymember and engaged within the slot IQ of the pointed out in the claims.gun barrel. It is to be understood, of course, that In the drawing: thecradle member can be carried directly on the Fig. 1 is a side elevationof the rearward porbarrel surface without a slot therein, the cradletion of a gun barrel, showing a rear sight assemand sight step beingheld in place by the leaf bly according to one embodiment of theinvenspring arm 13. The cradle member 20 is of U- shape in cross sectionhaving a horizontal flat base portion provided at its rearward end withan upwardly and rearwardly inclined ramp 2| and adjacent its forward endwith a transversely disposed knife edge support 22, formed by lancingout a pair of support portions 23 from the opposed side walls of thecradle and bending these portions inwardly and then vertically incontact with each other, as shown clearly in Fig. 5. The side walls ofthe cradle member are projected upwardlyabove the ramp 2| and above theknife edge 22, as at 24 and 25, and are bent inwardly toward each otherat a slight angle for the purpose of frictionally retaining therelatively adjusted pcsition of the step member within the cradlemember, as will presently more fully appear. Between the upwardlyextending side wall portions 24 and v25 the upper edges of the sidewalls are arched downwardly, as at 26, to substantially clear the stepformation in the upper side of the step member.

The step member 21 is of substantially the same length as the cradlemember, and is provided at the rearward end of its under surface with abearing foot portion 28, disposed at a corresponding angle to the ramp2| and slideably engaged thereon. At the forward end of its undersurface, the step member is provided with a series of relatively smallteeth or serrations 29, disposed along an inclined plane parallel to theinclined plane of the foot portion 28 and the ramp 2 and of a lengthsubstantially corresponding to the length of the ramp. These serrationsare engaged by the knife edge 22 at substantially the same pointintermediate their ends as the point of engagement of the foot portion28 intermediate the ends of the ramp 2|, the height of the knife edgebeing so calculated that it supports the step member in parallelrelation to the cradle member in any position of longitudinal adjustmentof the cradle member relatively to the step member. The knife edge 22 isin the form of an inverted v, having an angle shown for example asapproximately 45 at each side of the vertical plane of the knife edge,and the tooth formations 29 are at the same angle so that, through theirdisposition in an inclined plane, these tooth formations face forwardlyand thus resist relative rearward movement of the cradle memberrelatively to the step member, this being the normal ratchetingdirection of adjustment of the step member relatively to the rear sight.

The step member is provided in its upper surface with a series of heightadjusting step formations 30 of gradually increasing height forwardly,and which are engaged by the tooth |8 of the rear sight so that byforward adjustment of the step the open sight notch of the rear sight isadjusted for predesignated ranges, the rearward or lowest step formationbeing the zero point representing the shortest range. The cradle memberand the step member constitute a sub-assembly disposed in cooperativerelation in the slot IQ of the gun barrel and in the slot I! of the leafspring arm l3 of the rear sight, this sub-assembly normally operating asa unit for range adjustment through the frictional retension of one withrespect to the other by means of the inwardly bent gripping sides of thecradle member and the interlocking engagement of the knife edge with theteeth 29. As these teeth are in opposite direction to the direction ofthe steps 30 the sub-assembly may be range adjusted rearwardly as a unitthrough ratcheting engagement with the rear sight, without changing thezeroing adjustment, forward range adjustment being carried out bylifting the rear sight out of engagement with the step member.

In operation the rear sight is set at the zero adjustment, as shown inFigs. 1 and 2, and thereupon the cradle member is longitudinallyadjusted with respect to the step member to bring the step member to thedesired zeroing height for the individual gun and its user. In anyposition of height adjustment the step member remains in parallelrelation to the cradle member, so that there is no change in therelation between the height increments of the steps for predesignatedranges. After such zeroing adjustment the subassembly, constituted bythe cradle member and the step member, is operated as a unit in thenormal manner of the usual adjustable step, Fig. 3 illustrating onerange adjustment of the sub-as sembly with respect to the zero positionas shown in Figs. 1 and 2.

In Figs. 6 and 7 there is illustrated a modified form of cradle memberin which the knife edge 22 is formed by bending upwardly and rearwardlya lanced out portion 3| at the forward end of the base of the cradlemember, this portion being at a 45 angle and its end being ground to atransverse flat face 32 at right angles thereto, so that this end faceconstitutes with the inclined surface of the portion 3| a knife edge.Its cooperation with the step member is substantially identical with theembodiment of the invention shown in Figs. 1 to 5.

The form of the invention illustrated in the drawing and describedherein is typical and illustrative only, and it is evident that theinvention is capable of embodiments in other forms.

What is claimed is:

1. In a gun sight for attachment to a gun barrel, a height adjustablesight member supportable upon the barrel longitudinally of its axis, alongitudinally movable range adjustment member engageable with saidsight member to raise and lower it, a longitudinally movable heightadjusting member, and a pair of longitudinally spaced correspondinglyinclined ramp means cooperating between said height adjusting member andsaid range adjustment member to height adjust said range adjustmentmember uniformly along its length whereby a given angular relation tothe axis of the gun barrel is maintained in any position of heightadjustment of said range adjustment member.

2. In a gun sight for attachment to a gun barrel, a height adjustablesight member supportable upon the barrel longitudinally of its axis, alongitudinally movable range adjustment member engageable with saidsight member to raise and lower it, a longitudinally movable heightadjusting member, and a pair of longitudinally spaced correspondinglyinclined ramp means cooperating between said height adjusting member andsaid range adjustment member to height adjust said range adjustmentmember uniformly along its length whereby a given angular relation tothe axis of the gun barrel is maintained in any position of heightadjustment of said range adjustment member, at least one of said rampmeans comprising a series of tooth serrations on one of said membersand. a knife edge on the other of said members.

3. In a gun sight for attachment to a gun barrel, a height adjustablesight member supportable upon the barrel longitudinally of its axis, alongitudinally movable range adjustment member engageable with saidsight member to raise and \JUI ULUWH... luv..... w v

lower it, a longitudinally movable height adjusting member, and a pairof longitudinally spaced correspondingly inclined ramp means cooperatingbetween said height adjusting member and said range adjustment member toheight adjust said range adjustment member uniformly along its lengthwhereby a given angular relation to the axis of the gun barrel ismaintained in any position of height adjustment of said range adjustmentmember, one of said ramp means comprising a series of serrations on oneof said members and a knife edge on the other of said members, and theother of said ramp means comprising a bearing foot on said one memberand an inclined surface on said other member.

4. In a gun sight for attachment to a gun barrel, a height adjustablesight member supportable upon the barrel longitudinally of its axis, alongitudinally movable range adjustment member engageable with saidsight member to raise and lower it, a longitudinally movable heightadjusting member, and a pair of longitudinally spaced correspondinglyinclined ramp means cooperating between said height adjusting member andsaid range adjustment member to height adjust said range adjustmentmember uniformly along its length whereby a given angular relation tothe axis of the gun barrel is maintained in any position of heightadjustment of said range adjustment member, one of said ramp meanscomprising a series of serrations on said range adjustment member and aknife edge on said height adjusting member, and the other of said rampmeans comprising a bearing foot on said range adjusting member and aninclined surface on said height adjusting member.

5. In a gun sight for attachment to a gun barrel, a height adjustableleaf spring sight member supportable upon the barrel longitudinally ofits axis, and having a longitudinal slot, a longitudinally movable rangeadjustment step member engageable in said slot adapted throughlongitudinal movement to raise and lower said sight member, a cradlemember carrying said step member and longitudinally adjustablerelatively thereto, and ramp means cooperating between said cradle andstep members adapted to height adjust said step member, whereby a givenangular relation to the gun barrel is maintained in any position ofheight adjustment of said step member.

6. In a gun sight for attachment to a gun barrel, a height adjustableleaf spring sight member supportable upon the barrel longitudinally ofits axis, and having a longitudinal slot, a longitudinally movable rangeadjustment step member engageable in said slot adapted throughlongitudinal movement to raise and lower said sight member, a cradlemember carrying said step member and longitudinally adjustablerelatively thereto, and comprising a base and upwardly extending sidewalls clampingly engaged with the sides of said step member tofrictionally retain said cradle and step members against relativelongitudinal movement, and ramp means cooperating between said cradleand step members adapted to height adjust said step member, whereby agiven angular WWW MB H I Jill I relation to the gun barrel is maintainedin a position of height adjustment of said step member.

'7. In a gun sight for attachment to a gun barrel, a height adjustableleaf spring sight member supportable upon the barrel longitudinally ofits axis, and having a longitudinal slot, 2. longitudinally movablerange adjustment step member engageable in said slot adapted throughlongitudinal movement to raise and lower said sight member, a cradlemember carrying said step member and longitudinally adjustablerelatively thereto, and comprising a base and side walls, and ramp meanscooperating between said cradle and step members adapted to heightadjust said step member, whereby a given angular relation to the gunbarrel is maintained in any position of height adjustment of said stepmember, said ramp means including a series of toothserrations on theunder side of said step member and a knife edge on said cradle memberinterlockingly engaged with said tooth serrations.

8. In a gun sight for attachment to a gun barrel, a, height adjustableleaf spring sight member supportable upon the barrel longitudinally ofits axis, and having a longitudinal slot, a longitudinally movable rangeadjustment step member engageable in said slot adapted throughlongitudinal movement to raise and lower said sight member, a cradlemember carrying said step member and longitudinally adjustablerelatively thereto, and comprising a base and side walls, and ramp meanscooperating between said cradle and step members adapted to heightadjust said step member, whereby a given angular relation to the gunbarrel is maintained in any position of height adjustment of said stepmember, said ramp means including a series of tooth serrations on theunder side of said step member and a knife edge on said cradle memberinterlockingly engaged with said tooth serrations, said knife edgeconsisting of a pair of pointed support portions extended inwardly fromsaid side walls.

9. In a gun sight for attachment to a gun barrel, a height adjustableleaf spring sight member supportable upon the barrel longitudinally ofits axis, and having a longitudinal slot, a longitudinally movable rangeadjustment step member engageable in said slot adapted throughlongitudinal movement to raise and lower said sight member, a cradlemember carrying said step member and longitudinally adjustablerelatively thereto, and comprising a base and side walls, and ramp meanscooperating between said cradle and step members adapted to heightadjust said step member, whereby a given angular relation to the gunbarrel is maintained in any position of height adjustment of said stepmember, said ramp means including a series of tooth serrations on theunder side of said step member and a knife edge on said cradle memberinterlockingly engaged with said tooth serrations, said knife edgeconsisting of an fextension oi. said base inclined upwardly thererom.

JOHN D. HOWELL.

